It began as just another research project, in this case to examine the effects of various drugs on patients with a severe mood disorder. Using an advanced brain scanning technology—the clumsily named echo-planar magnetic resonance spectroscopic imaging (磁共振光谱成像) procedure, or EP-MRSI -researchers at Boston’s McLean Hospital scanned the medicated and unmedicated brains of 30 people with bipolar disorder in order to detect possible new treatments for the more than 2 million American adults who suffer from the disease.
The project described in the first paragraph aimed at finding（ ）.
A.正确答案Dwho had bipolar disorder
B.what improved people’s moods
C.whether magnetic scanning was a treatment for depression
D.how patients with a mood disorder responded to certain drugs
